Writes the character of charCode.
This method is equivalent to write(new String.fromCharCode(charCode)).
This operation is non-blocking. See flush or done for how to get any errors generated by this call.
void writeCharCode(int charCode) {
  _sink.writeCharCode(charCode);
}
    © 2012 the Dart project authors
Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
    https://api.dart.dev/stable/2.5.0/dart-io/Stdout/writeCharCode.html